Shure SE215 vs Sennheiser HD 598 SR

Bass is emphasized so there is a good bit of thump while staying controlled. Mids are rich, highs avoid sibilance, though they're a bit rolled off.
Soundstage is okay--instruments are separated out enough for them to not sound like they're all coming from the same place, but it's not particularly wide.

The memory foam eartips mold to your ear to provide amazing sound isolation, though there's a bit of a learning curve to using them. You have to press them together before putting them in and then allow them to expand in your ear. Once expanded they will take the shape of your ear and that way provide excellent noise isolation.

The earphones also come with silicon tips which are easier to use than the foam ones and also last longer.

The SE215 earphones have a negative profile, optimized nozzle angle, over-ear fit and memory eartips that ensure the earphones stay in place comfortably regardless of situation. You can even lie on your side with them.

6 types of plugs (silicon/ foam: S/M/L).

SE215 earbuds use tough plastic earpiece shells, have a robust kevlar-reinforced cable, a sturdy Y-splitter that's difficult to bend and an L-shaped plug that adds additional strain relief. They won't break if you snag them, drop them or sit on them. They're also completely sweat proof so you can use them while working out without having to worry about damaging them. They're durable enough for professional stage use for which they were specifically designed for.

The SE215's 6.4-ft. cable is very thick, and further reinforced at the left/right split point. Reviews confirm the durability benefits of its heavy-duty design. If it ever does break, the cable is built to detach safely from the earpieces, allowing replacement.

The optimized angle of the earbuds, over-ear fit, and memory ear tips ensure that the earphones stay in place comfortably regardless of situation. These are also sweat-proof, so they're a great option for active use.

Shure provides a warranty against defects in materials or manufacturing for two years.

The large ear pads feature a velour surface and a soft foam material underneath. The comfort of the headband is also notable. It features a synthetic leather material with a thick foam inside. In combination, these cushioned parts feel like pillows on the head.

These headphones are in a price range that is quite affordable, yet offers sound and build quality that is beyond the standards in its price bracket.

The bass takes a bit of a back seat compared to the other frequencies, yet is still enough to give fullness and punch to the sound. The mids are the star of these headphones' sound signature. They are clear and a little bit forward, which give a lot of extra detail and presence to guitars and vocals. The highs are pretty crisp and clean, and complement the other frequencies really well.

Even for open back headphones, the soundstage that the HD 598 produces is amazing. It is quite wide yet natural at the same time, which makes it feel like you're listening to the artist perform in front of you live. This wide sound stage and great imaging also make these ideal for games and movies, as these can enhance audio immersion.

This makes the headphones quite easy to store, and the cable easy to replace. Also, the attachment mechanism is a twist to lock system which minimizes the chances of the cable getting disconnected while in use.